22
November 2004 / Masterlink MICC / EN
Low battery alarm voltage set point (M01)
The MICC automatically detects a 12 or a
24-volt system. The factory default for the low
battery alarm is 11 volt if a 12-volt system is
used or 22 volt if a 24-volt system is used.
These values are correct if the battery is
discharged by the C 20 rate. If the discharged
rate is higher i.e. if the current is high, the low
voltage alarm may set slightly lower; for
example 10 / 20 volts. When the average
current is much lower than the C 20 rate this set
point can be set higher for example 12 / 24-volt.
For solar applications this voltage alarm can set
higher to avoid too deeply discharged batteries.
Low Ah set point (M02)
At the second level of this alarm menu the alarm
can be set according to the Ah consumed. Battery
voltage is not always correct to set an alarm. The
voltage of a battery is not only affected by the
state of charge of the battery, but is also affected
by the load connected to the battery during
discharge. The alarm for the low Ah discharge
floor is factory set at 35 % of the total capacity of
the battery. For an average battery installation this
value is normally ok, but the alarm for low Ah can
be set according to the requirements of the
application. For solar applications this value is
often set to 50 % and for cyclic applications
(forklifts) the value is often set at 20 %.
Alarm delay
The alarm is delayed for 30 sec. This means
that if the voltage is lower than the setting for
low battery voltage, the alarm will be activated
after 30 seconds. This prevents the alarm being
activated during a small dip in the battery
voltage.
Low battery alarm "off" setting (M03)
The fourth level is used to reset the alarm if the
battery reaches 80% state of charge. This
means with the factory default settings of 35 %
for low alarm, and 80 % for switching of the
alarm, the alarm is activated if the Ah consumed
drops below 35 % and it is reset when the
batteries
have
been
charged
up
to
80 % of their capacity. The value can be set
between 70 and 90 % according to the
requirements of the system.
Minimum alarm time setting (M04)
The fifth level of this alarm setting is used to set
the minimum time that the alarm will stay
activated. If for example the battery drops below
the settings for voltage and Ah but is charged
directly afterwards, the alarm will stay activated
for 10 minutes (factory setting) even if the
battery is charged above the settings for voltage
and Ah. This time can be adjusted between
5 and 90 minutes by means of the
Set-up
button
.
Maximum alarm time
The maximum alarm time is set for 6 hours and
used to set the maximum time the alarm will
stay activated. If for example the battery is
discharged below the settings for voltage and
Ah and will not be charged the alarm will stay
activated for a maximum of 6 hours.
Return to users menu (M05)
If this level is entered, it is possible to return to
the user menu by means of the
Set-up
button
.
Also if none of the buttons are touched for
15 seconds, the Masterlink MICC will return to
the users menu.
Select
LOW BATTERY
22.0V
Ç
Select
DIS.FLOOR
35%
Ç
Select
FULL CHARGE
80%
Ç
Select
MIN RUN TIME
10 MIN
Ç
Select
EXIT LEVEL
->PRESS SET-UP
